[Webkit-unassigned] [Bug 231974] New: [ iOS15 Sim Debug ] TestWebKitAPI._WKDownload.Resume is a flaky crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=231974

            Bug ID: 231974
           Summary: [ iOS15 Sim Debug ] TestWebKitAPI._WKDownload.Resume
                    is a flaky crash
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ehutchison at apple.com

TestWebKitAPI._WKDownload.Resume

is a flaky crash on iOS15 Sim Debug.

History: https://results.webkit.org/?recent=false&suite=api-tests&test=TestWebKitAPI._WKDownload.Resume&platform=ios

Build: https://ews-build.webkit.org/#/builders/9/builds/56954, https://build.webkit.org/#/builders/267/builds/228

Results: https://ews-build.webkit.org/api/v2/logs/15117402/raw, https://build.webkit.org/api/v2/logs/4752498/raw

>From STDIO on EWS:

Crashed
    TestWebKitAPI._WKDownload.Resume
        Child process terminated with signal 5: Trace/BPT trap
        2021-10-18 21:23:10.777 com.apple.WebKit.Networking.Development[95651:782981694] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Cannot create download task without request or resume data'
        *** First throw call stack:
        (
                0   CoreFoundation                      0x00000001114fefba __exceptionPreprocess + 242
                1   libobjc.A.dylib                     0x00000001112f8ff5 objc_exception_throw + 48
                2   CFNetwork                           0x0000000111c8f228 CFNetwork + 16936
                3   WebKit                              0x000000010f2bd667 _ZN6WebKit8Download6resumeERKN3IPC14ArrayReferenceIhLm18446744073709551615EEERKN3WTF6StringEONS_16SandboxExtension6HandleE + 353
                4   WebKit                              0x000000010f3af6a4 _ZN6WebKit15DownloadManager14resumeDownloadEN3PAL9SessionIDEN3WTF16ObjectIdentifierINS_22DownloadIdentifierTypeEEERKN3IPC14ArrayReferenceIhLm18446744073709551615EEERKNS3_6StringEONS_16SandboxExtension6HandleENS_20CallDownloadDidStartE + 132
                5   WebKit                              0x000000010f218f90 _ZN6WebKit14NetworkProcess31didReceiveNetworkProcessMessageERN3IPC10ConnectionERNS1_7DecoderE + 3212
                6   WebKit                              0x000000010f1df473 _ZN3IPC10Connection15dispatchMessageENSt3__110unique_ptrINS_7DecoderENS1_14default_deleteIS3_EEEE + 221
                7   WebKit                              0x000000010f1df6b5 _ZN3IPC10Connection26dispatchOneIncomingMessageEv + 169
                8   JavaScriptCore                      0x0000000117000cc1 _ZN3WTF7RunLoop11performWorkEv + 545
                9   JavaScriptCore                      0x0000000117001572 _ZN3WTF7RunLoop11performWorkEPv + 34
                10  CoreFoundation                      0x000000011146cede __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
                11  CoreFoundation                      0x000000011146cdd6 __CFRunLoopDoSource0 + 180
                12  CoreFoundation                      0x000000011146c29e __CFRunLoopDoSources0 + 242
                13  CoreFoundation                      0x00000001114669f7 __CFRunLoopRun + 875
                14  CoreFoundation                      0x00000001114661a7 CFRunLoopRunSpecific + 567
                15  Foundation                          0x000000010ed3d204 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 209
                16  Foundation                          0x000000010ed3d418 -[NSRunLoop(NSRunLoop) run] + 76
                17  libxpc.dylib                        0x0000000112d871a8 _xpc_objc_main + 591
                18  libxpc.dylib                        0x0000000112d89143 xpc_main + 143
                19  WebKit                              0x000000010f3934a8 _ZN6WebKit14XPCServiceMainEiPPKc + 87
                20  libdyld.dylib                       0x0000000112a31bbd start + 1
        )

>From https://build.webkit.org/#/builders/267/builds/228

(os/kern) memory data moved
worker/0 TestWebKitAPI._WKDownload.Resume Crashed
An error was encountered processing the command (domain=NSMachErrorDomain, code=24):
(os/kern) memory data moved

Unable to reproduce crash locally on ToT (r284463) using run-api-tests --ios-simulator --debug TestWebKitAPI._WKDownload.Resume.

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